RU2013142708A - METHOD FOR REMOVING A CYCLIC COMPLEX DIEPHIR OF 2-HYDROXYLICANIC ACID FROM STEAM - Google Patents

METHOD FOR REMOVING A CYCLIC COMPLEX DIEPHIR OF 2-HYDROXYLICANIC ACID FROM STEAM Download PDF

Info

Publication number
RU2013142708A
RU2013142708A RU2013142708/04A RU2013142708A RU2013142708A RU 2013142708 A RU2013142708 A RU 2013142708A RU 2013142708/04 A RU2013142708/04 A RU 2013142708/04A RU 2013142708 A RU2013142708 A RU 2013142708A RU 2013142708 A RU2013142708 A RU 2013142708A
Authority
RU
Russia
Prior art keywords
solution
steam
diester
base
column
Prior art date
Application number
RU2013142708/04A
Other languages
Russian (ru)
Other versions
RU2582681C2 (en
Inventor
Крикен Ян Ван
ВОС Сибе Корнелис ДЕ
Йоханнес Адрианус КАМП
Original Assignee
ПУРАК Биокем БВ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ПУРАК Биокем БВ filed Critical ПУРАК Биокем БВ
Publication of RU2013142708A publication Critical patent/RU2013142708A/en
Application granted granted Critical
Publication of RU2582681C2 publication Critical patent/RU2582681C2/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42—Separation; Purification; Stabilisation; Use of additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/008—Liquid distribution
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/06—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
    • C08G63/08—Lactones or lactides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/09—Preparation of carboxylic acids or their salts, halides or anhydrides from carboxylic acid esters or lactones
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/41—Preparation of salts of carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
    • C07C59/01—Saturated compounds having only one carboxyl group and containing hydroxy or O-metal groups
    • C07C59/08—Lactic acid
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D319/00—Heterocyclic compounds containing six-membered rings having two oxygen atoms as the only ring hetero atoms
    • C07D319/10—1,4-Dioxanes; Hydrogenated 1,4-dioxanes
    • C07D319/12—1,4-Dioxanes; Hydrogenated 1,4-dioxanes not condensed with other rings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/78—Preparation processes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Heterocyclic Compounds That Contain Two Or More Ring Oxygen Atoms (AREA)
  • Treating Waste Gases (AREA)
  • Degasification And Air Bubble Elimination (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

1. Способ удаления циклического сложного диэфира 2-гидроксиалкановой кислоты из пара, содержащего указанный сложный диэфир, в котором пар приводят в контакт с водным раствором, так что сложный диэфир растворяется в указанном растворе, отличающийся тем, что раствор является щелочным раствором.2. Способ по п.1, отличающийся тем, что сложный диэфир является лактидом, а гидроксиалкановая кислота является молочной кислотой.3. Способ по п.1, отличающийся тем, что pH раствора поддерживают выше 10.4. Способ по п.1, отличающийся тем, что pH щелочного раствора поддерживают в требуемом интервале pH путем добавления основания.5. Способ по п.4, отличающийся тем, что основание представляет собой гидроксид металла.6. Способ по п.4, отличающийся тем, что основание добавляют непрерывно.7. Способ по п.4, отличающийся тем, что количество основания, добавляемого в раствор, регулируют автоматически в зависимости от значения pH раствора.8. Способ по п.1, отличающийся тем, что температуру раствора поддерживают в интервале между 5°C и 40°C.9. Способ по п.1, отличающийся тем, что пар и раствор приводят в контакт в колонне, причем поток пара и поток раствора направляют в противоположных направлениях через указанную колонну.10. Способ по п.9, отличающийся тем, что раствор разбрызгивают в указанной колонне с помощью распределителя жидкости.11. Способ по п.9, отличающийся тем, что раствор и пар направляют через слой насадки, который присутствует в колонне.12. Способ по любому из пп.9, 10 или 11, отличающийся тем, что раствор циркулируют.13. Способ по п.12, отличающийся тем, что циркулирующий раствор пропускают через теплообменник.1. A method for removing a cyclic 2-hydroxyalkanoic acid diester from steam containing said diester in which steam is brought into contact with an aqueous solution, so that the diester is dissolved in said solution, characterized in that the solution is an alkaline solution. The method according to claim 1, wherein the diester is lactide and the hydroxyalkanoic acid is lactic acid. The method according to claim 1, characterized in that the pH of the solution is maintained above 10.4. The method according to claim 1, characterized in that the pH of the alkaline solution is maintained in the desired pH range by adding base. The method according to claim 4, characterized in that the base is a metal hydroxide. The method according to claim 4, characterized in that the base is added continuously. The method according to claim 4, characterized in that the amount of base added to the solution is automatically adjusted depending on the pH of the solution. The method according to claim 1, characterized in that the temperature of the solution is maintained between 5 ° C and 40 ° C. The method according to claim 1, characterized in that the steam and the solution are brought into contact in the column, wherein the steam stream and the solution stream are directed in opposite directions through the specified column. The method according to claim 9, characterized in that the solution is sprayed in the specified column using a liquid distributor. The method according to claim 9, characterized in that the solution and the steam are directed through the nozzle layer that is present in the column. A method according to any one of claims 9, 10 or 11, characterized in that the solution is circulated. The method according to p. 12, characterized in that the circulating solution is passed through a heat exchanger.

Claims (13)

1. Способ удаления циклического сложного диэфира 2-гидроксиалкановой кислоты из пара, содержащего указанный сложный диэфир, в котором пар приводят в контакт с водным раствором, так что сложный диэфир растворяется в указанном растворе, отличающийся тем, что раствор является щелочным раствором.1. A method for removing a cyclic 2-hydroxyalkanoic acid diester from steam containing said diester, in which steam is contacted with an aqueous solution, so that the diester is dissolved in said solution, wherein the solution is an alkaline solution. 2. Способ по п.1, отличающийся тем, что сложный диэфир является лактидом, а гидроксиалкановая кислота является молочной кислотой.2. The method according to claim 1, characterized in that the diester is a lactide, and the hydroxyalkanoic acid is lactic acid. 3. Способ по п.1, отличающийся тем, что pH раствора поддерживают выше 10.3. The method according to claim 1, characterized in that the pH of the solution is maintained above 10. 4. Способ по п.1, отличающийся тем, что pH щелочного раствора поддерживают в требуемом интервале pH путем добавления основания.4. The method according to claim 1, characterized in that the pH of the alkaline solution is maintained in the desired pH range by adding a base. 5. Способ по п.4, отличающийся тем, что основание представляет собой гидроксид металла.5. The method according to claim 4, characterized in that the base is a metal hydroxide. 6. Способ по п.4, отличающийся тем, что основание добавляют непрерывно.6. The method according to claim 4, characterized in that the base is added continuously. 7. Способ по п.4, отличающийся тем, что количество основания, добавляемого в раствор, регулируют автоматически в зависимости от значения pH раствора.7. The method according to claim 4, characterized in that the amount of base added to the solution is automatically adjusted depending on the pH of the solution. 8. Способ по п.1, отличающийся тем, что температуру раствора поддерживают в интервале между 5°C и 40°C.8. The method according to claim 1, characterized in that the temperature of the solution is maintained in the range between 5 ° C and 40 ° C. 9. Способ по п.1, отличающийся тем, что пар и раствор приводят в контакт в колонне, причем поток пара и поток раствора направляют в противоположных направлениях через указанную колонну.9. The method according to claim 1, characterized in that the steam and the solution are brought into contact in the column, the steam stream and the solution flow being directed in opposite directions through the specified column. 10. Способ по п.9, отличающийся тем, что раствор разбрызгивают в указанной колонне с помощью распределителя жидкости.10. The method according to claim 9, characterized in that the solution is sprayed in the specified column using a liquid distributor. 11. Способ по п.9, отличающийся тем, что раствор и пар направляют через слой насадки, который присутствует в колонне.11. The method according to claim 9, characterized in that the solution and steam are directed through the nozzle layer, which is present in the column. 12. Способ по любому из пп.9, 10 или 11, отличающийся тем, что раствор циркулируют.12. The method according to any one of claims 9, 10 or 11, characterized in that the solution is circulated. 13. Способ по п.12, отличающийся тем, что циркулирующий раствор пропускают через теплообменник. 13. The method according to p. 12, characterized in that the circulating solution is passed through a heat exchanger.
RU2013142708/04A 2011-04-05 2012-03-29 Method removing cyclic diester of 2-hydroxyalkanoic acid from vapour RU2582681C2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US201161471925P 2011-04-05 2011-04-05
US61/471,925 2011-04-05
EP11161172.9A EP2508548B1 (en) 2011-04-05 2011-04-05 Method for removal of the cyclic diester of a 2-hydroxy alkanoic acid from a vapor
EP11161172.9 2011-04-05
PCT/EP2012/055706 WO2012136568A1 (en) 2011-04-05 2012-03-29 Method for removal of the cyclic diester of a 2-hydroxy alkanoic acid from a vapor

Publications (2)

Publication Number Publication Date
RU2013142708A true RU2013142708A (en) 2015-05-10
RU2582681C2 RU2582681C2 (en) 2016-04-27

Family

ID=44117428

Family Applications (1)

Application Number Title Priority Date Filing Date
RU2013142708/04A RU2582681C2 (en) 2011-04-05 2012-03-29 Method removing cyclic diester of 2-hydroxyalkanoic acid from vapour

Country Status (13)

Country Link
US (1) US8987510B2 (en)
EP (1) EP2508548B1 (en)
JP (1) JP5813206B2 (en)
KR (1) KR101867281B1 (en)
CN (1) CN103459458B (en)
AU (1) AU2012238811B2 (en)
BR (1) BR112013025406B1 (en)
MX (1) MX2013011604A (en)
MY (1) MY161363A (en)
RU (1) RU2582681C2 (en)
UA (1) UA113622C2 (en)
WO (1) WO2012136568A1 (en)
ZA (1) ZA201307084B (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3768256B2 (en) * 1994-12-20 2006-04-19 株式会社ソフィア Valuable value storage medium issuing device for gaming machines
JPH08311175A (en) * 1995-05-17 1996-11-26 Shimadzu Corp Production of polylactate
JP3343477B2 (en) 1996-07-03 2002-11-11 株式会社神戸製鋼所 Method for producing polylactic acid
RU2301230C2 (en) * 2005-03-23 2007-06-20 Российский химико-технологический университет им. Д.И. Менделеева Method for preparing lactide
ES2359086T3 (en) * 2007-09-03 2011-05-18 Uhde Inventa-Fischer Gmbh PROCEDURE TO PURIFY PROCESS VAPORS IN THE PREPARATION OF POLYLACTIDE.
JP4670901B2 (en) * 2008-05-27 2011-04-13 株式会社日立プラントテクノロジー Polylactic acid production apparatus and method

Also Published As

Publication number Publication date
CN103459458B (en) 2015-11-25
KR20140031886A (en) 2014-03-13
US20140012043A1 (en) 2014-01-09
JP2014516353A (en) 2014-07-10
MY161363A (en) 2017-04-14
JP5813206B2 (en) 2015-11-17
WO2012136568A1 (en) 2012-10-11
AU2012238811A1 (en) 2013-11-07
EP2508548A1 (en) 2012-10-10
CN103459458A (en) 2013-12-18
ZA201307084B (en) 2015-04-29
BR112013025406B1 (en) 2020-05-19
US8987510B2 (en) 2015-03-24
AU2012238811B2 (en) 2015-06-11
UA113622C2 (en) 2017-02-27
MX2013011604A (en) 2013-12-16
EP2508548B1 (en) 2014-10-15
KR101867281B1 (en) 2018-06-15
BR112013025406A2 (en) 2017-08-01
RU2582681C2 (en) 2016-04-27

Similar Documents

Publication Publication Date Title
EP2703541A3 (en) Laundry treatment method and apparatus
RU2016138144A (en) REDUCING POLLUTION IN HYDROFORMING PROCESSES BY ADDING WATER
RU2014153106A (en) METHOD FOR HYDROFORMING
BR112015023583A2 (en) METHOD FOR 3-HP VAPORIZATION FROM A SOLUTION, VAPOR, CONDENSED 3-HP SOLUTION, COMPOSITION, DOWNSTREAM CHEMICAL, CONSUMER PRODUCT, SYSTEM FOR 3-HP PURIFICATION, METHOD FOR PRODUCING A 3-HP SOLUTION, METHOD FOR DECOMPOSING 3-HP AMMONIA (A3-HP) AND METHOD FOR DECOMPOSING A3-HP
FR2972452B1 (en) PROCESS FOR THE PREPARATION OF DIFLUOROACETONITRILE AND ITS DERIVATIVES
EA201491984A1 (en) METHOD FOR OBTAINING METACRYLIC ACID AND ITS DERIVATIVES, AND ALSO THE POLYMERS OBTAINED FROM THEM
RU2013142708A (en) METHOD FOR REMOVING A CYCLIC COMPLEX DIEPHIR OF 2-HYDROXYLICANIC ACID FROM STEAM
RU2018112480A (en) METHOD FOR OBTAINING POLYASPARAGINIC ACID WHEN COOLING BY A REFRIGERATED REFRIGERATOR
MX2015000709A (en) Chemical solution injection system and chemical solution injection method.
BR112017009359A2 (en) α-lactose crystallization method of an aqueous solution
RU2012118323A (en) METHOD FOR PRODUCING AN OXYGEN COATING OF AN OXYGEN LASER
RU2011153245A (en) METHOD FOR FORMING PROTECTIVE COATING FOR STORAGE OF OBJECTS OF WATER BIOLOGICAL RESOURCES USING MODIFIED PROTECTIVE COATINGS
EA201590155A1 (en) LOW SALT COMPOSITION PREPARED BY EXPERIMENTAL CRYSTALLIZATION
CN203810820U (en) Improved water cooling device
CN104390405A (en) Method for carrying out timing water cooling on finished product workpiece
EA201600160A1 (en) METHOD OF EVAPORATION AND DEVICE IMPLEMENTING THE METHOD
RU2012116230A (en) METHOD FOR PROCESSING AMMONIUM LACTATE IN DAIRY ACID AND ITS COMPLEX ETHERS
RU2013109835A (en) METHOD FOR CLEANING THE HEAT EXCHANGER FROM CARBONATE DEPOSITS
RU2012147036A (en) METHOD FOR PRE-STARTING PHYSICAL-MECHANICAL-STEAM CLEANING AND PASSIVATION OF THE INTERNAL SURFACE OF BOILER PIPES FROM DEPOSITS
RU2010121465A (en) METHOD FOR REGENERATING VENTILATION HEAT
EA201590244A1 (en) METHOD OF MAKING MEANS FOR THE TREATMENT OF TUBERCULOSIS
TH172352A (en) The process for producing granules with greatly improved properties. From solutions and amino acid suspensions
TH176249B (en) Saccharides production process from Aqueous solution of saccharides
RU2013112978A (en) METHOD OF ULTRASONIC CLEANING OF PROTECTIVE EQUIPMENT
RU2016109063A (en) METHOD OF WATER SUPPLY